Well, if you don't clean the wheels weights first, then you just might as well go ahead and after you lube the bullets, roll them in sand first. Sure will make for no leading?

You have to clean the wheel weights of dirt and clips. For this you are going to need flux and a spoon. You have to make sure that when you flux the metal and the dross forms, you do not take out the tin, which will float.

Definitely ingots. Clean the crud out as inplanotx and xracer have said. Makes things a lot easier to measure and mix your ingredients, if you are adding anyhting to the wheel weights, and a whole lot cleaner come bullet time.

I add the 50/50 bar solder at a 1 to 10 ratio. It really hardens up the bullets. I have found that they decrease the leading when making real hot loads for my 45 Colt. I use a 300 gr gas check bullet. Will usually go straight through any animal. Even a pig!